Reasons for red spots on the tongue: First, this is a sign of inflammation. If the patient often appears against the upper and lower teeth, because the tongue body is soft, long time against the upper or lower teeth, chronic inflammation may occur, and the patient does this because it is caused by too much mental tension and needs to do something else to distract himself. Secondly, if the tongue is traumatized by burns or frostbite, or friction, this red spot will also appear, but the red spot will heal on its own in about 1-2 weeks. If the red spots do not heal after the trauma, and there is overgrowth, the patient should go to the stomatology department in time to have the pathology diagnosed after the removal.